My heater is not working. i started my car this morning and let it sit for about 10 minutes. Once i got in the car it was only blowing out cold air. I checked and everything was in the right position. It worked fine last winter but not now. I have also noticed that the fan stays on a few minutes after i have parked the car. i have barely used the air conditioner, could really use your help if possible.
Low on coolant would be my first guess. Does the temp gauage go up to middle, normal range?Should have a low coolant light on dash, but sometimes the sensor is diabled or broken. I would relace the t-stat and the sensor next to the t-stat housing. Tou will need a 40 torx to get the t-stat off.
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Low coolant, if there is an air pocket in the engine it will make it to the heater core. Once there , the air coming out is cold/cool. Once the coolant fills the heater core, it gets hot. If the coolant is fine hot or cold, then have the HVAC system scanned.
That seems pretty normal, the heater works by blowing excess heat from the engine coolant. So the coolant has to be warmed completely for the heat to work, you can get a heater that plugs into your cigarette lighter that will heat the vehicle instantly.
I have a 1994 Volvo 850 that did the same thing. It was the fuel pump relay, a $50 part that is easy to replace yourself. It could also be the thermostat ($75) in the air flow box. Some people remove the bad thermostat and fix the air flow tube in the position with the air flow coming in from the front of the car. People say you can freeze your engine in winter if you live in a cold climate. It rarely gets cold where I live so it wasn't a problem for me. You do get better gas mileage without that thermostat. I ran my car without the thermostat for about a year and then put a new one in because I started having rough idling problems when the engine had not warmed up yet. The thermostat funnels in hot air from the manifold (?) until the engine warms up and then the spring in the thermostat closes off the tunnel with that hot air flow and opens up the tunnel with the cooler air flow coming in from the front of the car. If the thermostat quits working, the hot air keeps coming in and the engine shuts off after about 10 minutes of driving. The car will usually start right up after you wait a few minutes. These symptoms don't usually show any engine codes.
Are the radiator hoses from the engine to the firewall hot? If so, it's probably not the thermostat, it's probably either the heater core or the controls not allowing the heat to get in. Best advice I have (because I had to replace the heater core in my car last year) is to buy a Chilton repair manual for it. it walks you through everything. If it is a heater core, be prepared for a long job...
You can check 2 things. 1., have someone in the car to turn the key to the start position. Tap the starter with a small hammer and see if it cranks. If it does, replace the starter. 2., have the battery tested as well as the connections to the battery. Corrosion builds and can cause heavy resistance to heavy loads(like starting). These are the 2 most likely causes. Let me know if you need further assistance.